What makes a food 'filling'? Is it just calories? |
- What makes a food 'filling'? Is it just calories?
- Does the universe have a center of mass?
- Are there things in genetics that can skew the general 50/50 nature of having a boy or girl?
- Do you have to take into account atmospheric pressure when calculating the upward acceleration of rockets?
- Is there a way to know where did the asteroid A/2017 U1 came from?
- If the windchill is below freezing but the actual temperature is above freezing, will water freeze?
- Why is it that oil has a very noticeable change in viscosity at different temperatures, but water does not?
- Is it possible for two suns to exist in a solar system?
- How did we figure out the mass of elementary particles?
- What is difference between Photon in terms of quantum of light and Electromagnetic force carrier?
- Don't plasma drifts due to curvature and gravity mean that tokamaks are inherently flawed?
- Why do cosmic X-ray sources appear to be more isotropic than the microwave background radiation?
- How are the leaves of touch sensitive plants, i.e. Venus fly traps and the shame plant actuated? How do they sense that there is something on them without nerves?
- how can condensation occur INSIDE a sealed plastic bag?
- What kind of effect would the gravitational waves generated by GW170817 have on surrounding star systems (aside from the massive release of electromagnetic energy)?
- Is "a coma" a blanket term for multiple conditions?
- Why is it possible for photons to have exactly the right frequency to cause an electron transition in atoms?
- Are we sure that SI units are sufficient?
- How can I separate gold mixed with iron ?
- How do we know anyons exist if they only occur in two dimensional systems?
- If you have a dimmable lightbulb and always turned it to partial brightness, would it last longer than a lightbulb always turned to full brightness?
- Dark matter has mass and is effected by gravity. Does this mean that dark matter coalesces into planet and star-like masses?
| What makes a food 'filling'? Is it just calories? Posted: 29 Oct 2017 06:48 PM PDT |
| Does the universe have a center of mass? Posted: 29 Oct 2017 04:25 PM PDT |
| Are there things in genetics that can skew the general 50/50 nature of having a boy or girl? Posted: 30 Oct 2017 06:13 AM PDT We have a running joke in our family that "we only make boys". My father was one of 8 brothers. he himself had 3 sons (2 different marriages) his middle son has 2 sons (again 2 different partners) and is expecting a 3rd son in the next few months. nobody else in our family has kids yet.... now based on the fact we are taught all the way through schools that the boy girl chance is about 50/50, that makes the chance of my family's male child run of 14 children in the region of 1/16400... i.e pretty unlikely Obviously we could just be incredibly Lucky/Unlucky (delete as appropriate) but i'm curious to know if there is anything that makes people more predisposed to creating male or female offspring? [link] [comments]  |
| Posted: 30 Oct 2017 04:45 AM PDT Hi, If yes, do you have to apply the force of gravity and the force of atmospheric pressure separately? [link] [comments]  |
| Is there a way to know where did the asteroid A/2017 U1 came from? Posted: 30 Oct 2017 05:45 AM PDT The trajectory of the asteroid A/2017 U1 has been already calculated/estimated from observations, so we know now which direction it came from, I think I have read somewhere that it came approximately from the direction of Vega. However its approximation speed to the solar system (26 km/s) means it would have taken 300,000 years to make the travel, what may locate Vega and all near stars from a totally different positions, not to mention further stars. [link] [comments]  |
| If the windchill is below freezing but the actual temperature is above freezing, will water freeze? Posted: 30 Oct 2017 03:20 AM PDT |
| Posted: 29 Oct 2017 08:17 PM PDT |
| Is it possible for two suns to exist in a solar system? Posted: 30 Oct 2017 05:01 AM PDT Is it possible to have two suns, next to eachother, with planets rotating around them, as one solar system? How would that work, and how would it affect the planets? [link] [comments]  |
| How did we figure out the mass of elementary particles? Posted: 29 Oct 2017 02:56 PM PDT Have always we figured out the mass of such small particles. [link] [comments]  |
| What is difference between Photon in terms of quantum of light and Electromagnetic force carrier? Posted: 30 Oct 2017 07:10 AM PDT It says it all, i don't seem to find an answer, if photon is referred to both what is different? [link] [comments]  |
| Don't plasma drifts due to curvature and gravity mean that tokamaks are inherently flawed? Posted: 30 Oct 2017 01:00 AM PDT It's what it sounds like. Charged particles traveling in a curved path have a curvature drift, which results in the particle having...
i.e. up or down. Along with the myriad other drifts that charged particles undergo, one is due to an external force - in this case, drift due to gravity. This could cause a drift in a couple different directions, depending on which magnetic field you look at. Tokamaks will have both of these drifts present, and both drifts serve to drive charged particles into the wall of the reactor, which immediately causes them to lose any potential of fusion. Therefor, tokamaks are doomed to fail before they ever get the chance. Hence, Stellarator. This is stuff I learned in an introductory plasma physics course. If it's such basic knowledge, and seemingly inescapable for toroidal approaches to fusion, why are world-class physicists still chasing tokamaks, like ITER? Is there a secret that I just don't know about? [link] [comments]  |
| Why do cosmic X-ray sources appear to be more isotropic than the microwave background radiation? Posted: 29 Oct 2017 04:09 PM PDT This image is composed of two distinct pictures of the Milky Way: the left one on X-ray wavelengths, the right one on the microwaves. Shouldn't X-ray sources appear more localized, at least compared to the CMB radiation map? [link] [comments]  |
| Posted: 29 Oct 2017 05:56 PM PDT |
| how can condensation occur INSIDE a sealed plastic bag? Posted: 30 Oct 2017 05:38 AM PDT So i have a sealed bag of jelly (each with their own individual plastic packaging). I placed this in a cooler box with ice. And when i took it out, there was water INSIDE the plastic packaging. I don't understand where this water came from (no holes in the plastic bag). I think it's condensation but does that not require humid air. Temperature that day was pretty hot so there is humid air AROUND the plastic packaging, but would the air inside the packaging itself (why would that be humid) be able to cause condensation from the jelly? [link] [comments]  |
| Posted: 30 Oct 2017 01:24 AM PDT |
| Is "a coma" a blanket term for multiple conditions? Posted: 29 Oct 2017 04:10 PM PDT |
| Posted: 29 Oct 2017 10:58 AM PDT As far as I understand the energy levels of electron orbitals in atoms are strictly quantised. So it takes x amount of energy for an electron to move from n=1, to n=2. So to make this transition the atom can absorb a photon of energy E=x=hf. The possible energy spectrum of photons is continuous (?), so to me it seems like the probability of any photon having an energy of exactly x should be zero. Given this, the probability of a photon being able to cause a transition should also be zero. What part of my reasoning is wrong? [link] [comments]  |
| Are we sure that SI units are sufficient? Posted: 30 Oct 2017 02:58 AM PDT For example, in the past, people can know and measure quantities like time, mass, length. And it was sufficient, but they didnt know about electricity or didnt know how to measure temperature. Today we know. But is it possible in the future we will have to "invent" new quantity/ies because SI units wont be sufficient? Some quantities we even dont consider today? [link] [comments]  |
| How can I separate gold mixed with iron ? Posted: 30 Oct 2017 06:22 AM PDT |
| How do we know anyons exist if they only occur in two dimensional systems? Posted: 30 Oct 2017 02:32 AM PDT How would we ever be able to prove that anyons exist? Is it possible to create our own two dimensional system? [link] [comments]  |
| Posted: 29 Oct 2017 10:23 AM PDT |
| Posted: 29 Oct 2017 10:35 AM PDT If that is the case it blows my mind that there is matter like this in the universe and we have no way of directly observing it. Would a normal matter object fall straight through a planet-like mass made of dark matter? [link] [comments]  |
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